oral arithmetic
常见例句
- An English Grid, using set arithmetic (mathematics) to analyze oral English testing, phonetic symbols and tenses, is defined as 'grid' because relevant sets are all two-dimensional tables.
所谓英语网格，即用集合算法（数学）分析英语口语评测、音标及时态，因涉及的集合均为二维表格， 所以定义为“网格”。
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